Question 1: Is the license something that we can "rent" from you and pay on an annual basis, or are all license's a one-time buy, and then ensuing upgrades also one-time buys? Question 2: In general, how much do the upgrades cost, and how often would we need to install upgrades? Question 3: When we buy the license, maintenance runs out after a year. How much is maintenance if we want to have that after the first year? Thanks! Best,